Friday, March 04, 2011

On the Repeating JAXA Data

It turns out there is a perfectly rational explanation for the repeating numbers in the JAXA data for Arctic sea ice extent. The area is calculated by counting pixels in a satellite photograph, and each pixel has an area of 156.25 km2. So the total extent is going to be an integer multiple of that amount: 0156, 0312, 0468, etc.

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